Savage 116 Barrel Lock Nut Steel Blued

Ergo Castle Nut for AR-15, Black - 4971-(B)

Sons of Liberty Gun Works Barrel Nut

CMMG Barrel Nut, Black - Essential Component for Secure Barrel Installation and Reliable Performance - 55DA244

JP Enterprises Hex Jam Nut 5/8-24, Black

Tacfire Buffer Tube Castle Nut for AR-15 - Black, Essential for Assembly - MAR039

JP Enterprises Enhanced Carbine Buttstock Castle Nut, Black

ARMASPEC SELF-RETENTION CASTE NUT / ALUM - BLACK